<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <!-- import CSS -->
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.9/theme-chalk/index.css">
</head>
<body>
<div id="app">
    <el-menu mode="horizontal"  @select="handleSelect">
        <el-menu-item v-for="c in arr" :index="c.id">{{c.name}}</el-menu-item>
    </el-menu>
</div>
</body>

<!-- import Vue before Element -->
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<!-- import JavaScript -->
<script src="https://cdn.staticfile.org/element-ui/2.15.9/index.min.js"></script>
<script>
    let v = new Vue({
        el: '#app',
        data: function () {
            return {
                arr:[{id:1,name:"品牌男装"},
                    {id:2,name:"精品女装"},
                    {id:3,name:"数码科技"},
                    {id:4,name:"医药健康"}]
            }
        },
        methods:{
            handleSelect(key,keyPath){
                //此方法不能直接输出数字 需要转成字符串
                v.$message("您点击分类的id="+key);
            }
        }
    })
</script>
</html>